Grinding or polishing machine.



No. 726,510. PATENTED APR. 28, 1903.

E. GRAMER.

GRINDING OR POLISHING MACHINE.

' APPLICATION FILED SEPT. 24, 1902.

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ENOCH ORAMER, OF TRENTON, NEYV JERSEY.

GRINDBNG OR POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 726,510, dated April 28, 1903.

Application filed September 24. 1902. Serial no. 124,688. (No model.)

To rtZl w/wm it may concern.-

Be it known that I, ENOCH ORAMER, a subject of the Emperor of Austriallungary, (but having declared my intention of becoming a citizen of the United States,) residing at Tron-- ton, in the county of Mercer and State of New Jersey, have invented certain new and useful Improvements in Grinding or Polishing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in machines for grinding and polishing concave surfaces, and is particularly designed for concaving razors.

It has for its objects to provide a machine which shall automatically adjust the grinding or polishing rollers to the surface to be operated upon and in which the razor or tool rest or holder is capable of vertical adjustment to predetermine the degree of concavity to be produced or polished.

Nith these ends in view my invention con-- sists in the details of'construction and arrangement of parts hereinafter described.

In order thatthose skilled in the art to which my invention appertains may know how to make and use my improved machine and to fully appreciate its advantages, I will proceed to describe its construction and operation, referring by letters to the accompanying drawings, in which- Figure 1 is a central longitudinal section on the line 1 1 of Fig. 2. Fig. 2 is a transverse section on the line 2 2 of Fig. 1. Fig. 3 is a perspective View of the razor-rest or tool-holder, and Fig. 4 is a detail section taken on the line 3 3 of Fig. 1 and showing the automatic spring adjustment of the grinding or polishing rollers.

Similar letters of reference indicate like parts in the several figures of the drawings.

A represents the metallic frame, which is preferably made of sheet metal bent to form the base and two parallel ends, as clearly shown in section at Fig. 1.

B B are two shafts mounted in parallelism in horizontally-elongated hearings in each end of the frame A,.as indicated in dotted lines at Fig. 2, and these shafts are equipped l with grinding or polishing rolls C, as may be desired. One end of each of the shafts B is reduced to form an annular shoulder D and to receive a ring-washer E, and upon the reduced portion of each shaft is fixed a pinion F, adapted to mesh with each other, and one of said pinions meshing with a gear G, fixed to a driving-shaft H, suit-ably mounted in the ends of the frame A and provided with an operating-crank I or a band-pulley, if desired. The reduced ends of the shafts B B are secured within their respective bearings in-the end of the frame by means of a screw J and washer K, as shown in dotted lines at Fig. 1 or in any other suitable manner.

L L are springs,preferably arc-shaped and having their free ends surrounding or embracing the shafts B B, as most clearly shown at Fig. 2, and adapted to automatically adjust said rolls and keep them in proper relation as their grinding or polishing surfaces become worn, the elongated hearings in the ends of the frame A serving to permit the necessary movement of the shafts under the spring action referred to.

M is a razor-rest or tool-holder, preferably made of sheet-steel and formed with a central longitudinal gateway or opening N, the sides or edges of which are equipped with softer metal guide-plates 0, adapted to guide and direct the razor-blade or other tool to the action, of the grinding or polishing surfaces of the rolls 0. This rest is formed with an end M at right angles to the body and with a vertical continuation of the gateway N, as clearly shown at-Figs. 1 and 3. It is also provided with two parallel vertically-elongated channels? for the passage of the roller'shafts B E and is provided with a screw-threaded extension Q, adapted to receive a wing-nut R, as clearly seen at Fig. 1, and this screwthreaded extension is located Within a vertical kerf or opening S in the end of the frame A and in alinement with the gateway N of the holder M. With this construction and arrangement it will be seen that the rest or holder M may be raised or lowered to present the razor or other tool located between the guide-plates O in any desired adjustment to the grinding or polishing surfaces of the rollers and held in any predetermined position by tightening the wing-n ut B, and thus clam p ing the vertical end M of the rest or holder against the end of the frame A.

When desired and to give the machine a more attractive appearance, it may be confined within a suitable case or cabinet T (shown in section at Figs. 1 and 2,) and provided with a longitudinal and vertical gateway U, corresponding with the gateway in the rest or holder M, and when such case or cabinet-is composed of wood or similar material it is provided with a bearing-plate V, against which the wing-nut R bears. \Vhile I have shown and prefer to use the arc-shaped springs, as shown and described, to adjust the roller-shafts to compensate for any wear taking place in their grinding or polishing surfaces, it will be understood that I may employ springs of other designs for such purpose or that I may employ positive means for adjusting said rollers, and while my improved machine is especially applicable for the use of grinding-rolls for the purpose of concaving razors it will be understood that polishingrolls maybe used to buff or polish the previously-ground concave surfaces of razors and that concave surfaces of other tools or implements may likewise be ground and polished. I do not wish to he confined to making the frame A of a single piece bent or castinto the form shown, for it, may be constructed of a base-piece with the ends rigidly secured thereto in any suitable manner without departing from the spirit of my invention.

The proportions and relations of the rollershafts B B and their hearings in the ends of the frame A and the manner of securing them in position by the screws J are such that obviously'the said shafts may be readily removed by first withdrawing the screws J and then moving said shafts longitudinally to release them from their bearings, so that shafts carrying rolls of different characters may be substituted or in order that rolls of a different character may be secured to the said shafts when the rolls are made removable from the same.

The genus of my invention resides in the adaptability of the rollers to parallel adjustment and means for driving the same synchronously in opposite directions, in combination with a vertically-adjustable rest or holder provided with a longitudinal and vertical gateway or opening for the passage of the razor-blade or other tool to be operated upon and so that when adjusted with reference to a predetermined degree of concavity to be produced or to be polished, as the case may be,it will not require expert labor to produce the desired result.

Having described the construction and operation of my improved grinding and polishing machine, what I claim as new, and desire to secure by Letters Patent, is

1. In a grinding and polishing machine, in combination with parallel grinding and polishing rolls provided with means for compensating adjustment, and a drivingshaft, gearing intermediate of the driving-shaft and the rolls, a rest or holder composed of a single piece located above the rolls and provided with a longitudinal passage or gateway, and adapted to be moved bodily to raise or lower the razor or other tool held therein, substantially as hereinbefore set forth.

2. In a grinding and polishing machine such as described, in combination with the grinding or polishing rolls, adj ustably mounted in the frame, and means for driving said rolls from opposite directions toward one another, a vertically-adjustable rest or holder provided with a longitudinal gateway, and a rigid screw-threaded stem, and a clampingnut adapted to secure the rest or holder in any desired adjustment, substantially as and for the purpose set forth.

3. In a grinding and polishing machine such as described, in combination with the axially-adjustable rolls, and means for driving the same, the vertically-adjustable rest or holder provided with a longitudinal gateway and having lips or bearing-surfaces of soft metal,substantially as and for the purpose described.

4. In a grinding and polishing machine such as described, in combination with axially-adjustable rolls mounted in the frame in the manner described, a rest or holder formed of a single piece of metal having a longitudinal gateway, and a vertical arm provided with a rigid screw-threaded stem located with in a vertical channel in the frame, and a bindingnut secured upon the screw-threaded stem, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ENOOII ORAMER. VVi-tnesses:

BAYARD STOCKTON, JOHN H. KAF'ER. 

